lustre/include/linux/lustre_import.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001  Cluster File Systems, Inc.
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  */
   9
  10 #ifndef __IMPORT_H
  11 #define __IMPORT_H
  12
  13 #include <linux/lustre_handles.h>
  14 #include <linux/lustre_idl.h>
  15
  16 enum lustre_imp_state {
  17         LUSTRE_IMP_CLOSED     = 1,
  18         LUSTRE_IMP_NEW        = 2,
  19         LUSTRE_IMP_DISCON     = 3,
  20         LUSTRE_IMP_CONNECTING = 4,
  21         LUSTRE_IMP_REPLAY     = 5,
  22         LUSTRE_IMP_REPLAY_LOCKS = 6,
  23         LUSTRE_IMP_REPLAY_WAIT  = 7,
  24         LUSTRE_IMP_RECOVER    = 8,
  25         LUSTRE_IMP_FULL       = 9,
  26         LUSTRE_IMP_EVICTED    = 10,
  27 };
  28
  29 static inline char * ptlrpc_import_state_name(enum lustre_imp_state state)
  30 {
  31         static char* import_state_names[] = {
  32                 "<UNKNOWN>", "CLOSED",  "NEW", "DISCONN",
  33                 "CONNECTING", "REPLAY", "REPLAY_LOCKS", "REPLAY_WAIT",
  34                 "RECOVER", "FULL", "EVICTED",
  35         };
  36
  37         LASSERT (state <= LUSTRE_IMP_EVICTED);
  38         return import_state_names[state];
  39 }
  40
  41 enum obd_import_event {
  42         IMP_EVENT_DISCON     = 0x808001,
  43         IMP_EVENT_INACTIVE   = 0x808002,
  44         IMP_EVENT_INVALIDATE = 0x808003,
  45         IMP_EVENT_ACTIVE     = 0x808004,
  46 };
  47
  48 struct ptlrpc_sec;
  49
  50 struct obd_import_conn {
  51         struct list_head          oic_item;
  52         struct ptlrpc_connection *oic_conn;
  53         struct obd_uuid           oic_uuid;
  54         unsigned long             oic_last_attempt; /* in jiffies */
  55 };
  56
  57 struct obd_import {
  58         struct portals_handle     imp_handle;
  59         atomic_t                  imp_refcount;
  60         struct lustre_handle      imp_dlm_handle; /* client's ldlm export */
  61         struct ptlrpc_connection *imp_connection;
  62         struct ptlrpc_client     *imp_client;
  63         struct list_head          imp_observers;
  64         struct list_head          imp_pinger_chain;
  65
  66         /* Lists of requests that are retained for replay, waiting for a reply,
  67          * or waiting for recovery to complete, respectively.
  68          */
  69         struct list_head          imp_replay_list;
  70         struct list_head          imp_sending_list;
  71         struct list_head          imp_delayed_list;
  72
  73         /* list of ongoing raw rpcs (only used by gss) */
  74         struct list_head          imp_rawrpc_list;
  75
  76         struct obd_device        *imp_obd;
  77         struct ptlrpc_sec        *imp_sec;
  78         wait_queue_head_t         imp_recovery_waitq;
  79         __u64                     imp_last_replay_transno;
  80         atomic_t                  imp_inflight;
  81         atomic_t                  imp_replay_inflight;
  82         enum lustre_imp_state     imp_state;
  83         int                       imp_generation;
  84         __u32                     imp_conn_cnt;
  85         __u64                     imp_max_transno;
  86         __u64                     imp_peer_committed_transno;
  87         struct obd_uuid           imp_target_uuid; /* XXX -> lustre_name */
  88         struct lustre_handle      imp_remote_handle;
  89         unsigned long             imp_next_ping;
  90         unsigned long             imp_connect_start;
  91
  92         /* all available obd_import_conn linked here */
  93         struct list_head          imp_conn_list;
  94         struct obd_import_conn   *imp_conn_current;
  95
  96         /* Protects flags, level, generation, conn_cnt, *_list */
  97         spinlock_t                imp_lock;
  98
  99         /* flags */
 100         int                       imp_invalid:1, imp_replayable:1,
 101                                   imp_dlm_fake:1, imp_server_timeout:1,
 102                                   imp_initial_recov:1, imp_force_verify:1,
 103                                   imp_pingable:1, imp_resend_replay:1,
 104                                   imp_deactive:1,
 105                                   imp_waiting_ping_reply:1,
 106                                   imp_debug_open_replays:1;
 107         __u32                     imp_connect_op;
 108         __u32                     imp_connect_flags;
 109         struct obd_connect_data   imp_connect_data;
 110
 111         unsigned long             imp_last_ping_xid;
 112         int                       imp_reqs_replayed;
 113         int                       imp_locks_replayed;
 114 };
 115
 116 typedef void (*obd_import_callback)(struct obd_import *imp, void *closure,
 117                                     int event, void *event_arg, void *cb_data);
 118
 119 struct obd_import_observer {
 120         struct list_head     oio_chain;
 121         obd_import_callback  oio_cb;
 122         void                *oio_cb_data;
 123 };
 124
 125 void class_observe_import(struct obd_import *imp, obd_import_callback cb,
 126                           void *cb_data);
 127 void class_unobserve_import(struct obd_import *imp, obd_import_callback cb,
 128                             void *cb_data);
 129 void class_notify_import_observers(struct obd_import *imp, int event,
 130                                    void *event_arg);
 131
 132 #define IMP_EVENT_ACTIVE   1
 133 #define IMP_EVENT_INACTIVE 2
 134
 135 /* genops.c */
 136 struct obd_export;
 137 extern struct obd_import *class_exp2cliimp(struct obd_export *);
 138 extern struct obd_import *class_conn2cliimp(struct lustre_handle *);
 139
 140 #endif /* __IMPORT_H */